Heel treating



i K. w. MACDONALD HEEL TREATING Filed Nov. 12, 1940 a Sheets-Shegt i @QJMI Ma Q9 zMQQM Aug, 14,1945. f K. W. MACIIDONALD HEEL TREATING Filed Nov. 12, 1940 s Sheets-Sheet 2 l/ i I 5 K. w. MACDONALD HEEL TREATING 8 Sheets-Sheet 3 Filed Nov. 12, 1940 g 1945- K. w. MACDONALD HEB L TREATING Filed Nov. 12, 1940 8 Sheets-Sheet 4 v K. w. MACDONALD HEEL TREATING Aug. 14, 1945.

8 SheetsSheet 5 Filed Nov. 12, 1940' 4 w. MACDONALD 2,332,247

HEEL TREAT ING Filed Nov. 12, 1940 .3 Sheets-Sheet e 155.24 v/aa L L l- I /a/ mam Filed Nov. 12, 1940 K. w. MACDONALD 2,382,247

HEEL TREATING 8 Sheets-Sheet 7 ua- 4 1945- 'K. W.IMACDONALD HEEL TREATING File d Nov. 12, 1940 s Sheets-Sheet 8 eleyation along Fig. is a fragmentary longitudinal sectional .,..is then elevated to pick up the screw and carry "it"through the hollow jack pin and through the view taken approximately medially throughthei. 2

upper portion of the machine and showing parts of the screw driving mechanism, some. parts beingshowninsection;

Fig. 11 is a fragmentary front elevation on" an enlarged scale along line l|.-.-I Ilof Fig.' 10. 1

Fig. 12 is a fragmentary sectional view showing a detail of the screw receiving socket;

1111013611 position;

Fig. 14;is arside elevation similar to rials, but.

showing the clamping mechanism in clamping positiom: 1 j

15 is a side elevation showing details of clamping and drilling mechanism V Fig. ,16 is a longitudinal sectional view, on an enlargedscale. as, compared with Fig; 15, showing details, of mechanism for controlling the screw driverrjand V I a Fig. l'liis a wiring diagram showing one suitable arrangement for controlling the electrically operatedparts of the machine. .7 The machine specifically described and illustrated herein by way of example'is arranged to drive a wood screw into-ailadys high woodheel. Of ,course any other kind of heel capable of receivinggadrivenfastener, such as leather and the various:;kinds of plastic heels, can behandled.

and certain featuresof the inventioncan be applied. to vadvantage whether the fastener is a Wood screw, as pre f erred'orof some other type such, as a nailor nails, a press driven rivet, rthel i v The machine construction is also readily adaptable ;to other work treating operations involv-' ing drilling or driving, such as drilling a heel and inserting areinforcing dowel therein, V .,While. the machine canreadily be used for heelingdelastedshoes, its chief benefits are o b-j tained when the heel is attached while .the.,shoe

is still lasted on last having a special drill and" screw receiving bore through the heel end thereof.

' Characteristic features of the machine comprise provided which elevates the'clamp against its bias.

The shoe and h'eeljareinserted in the opened clamp over a hollow jack pin and when thus properly positioned, the lifterisreleased to enable the clamp to operate under its bias to hold the parts together.- Thereafter a rotating drill is elevated through the hollow jack: pin. 'and' through the-opening in the last so as to drill a screw receiving bore throughthe'insole and other heel seat materials 'if -they 'are present and into the heel. tinues to a depth which may be 'detenninedby. the

This drilling operation 'coni 2o Fig. l3-is aside elevation on a reduced scale. showing the. shoe and heel clamping mechanism:

length of the drill shank and stops when the drill spindle, which isthicker than the shank, touches against the insole of the shoe or some other suitable abutment in the last opening. The drill is then retracted and the clamp is swung from the position it occupies during drillin to another position in registry with a screw driver. A screw is previously dropped by hand into a suitable socket in the machine frame also in permanent registry with the screw driver, which ;last and drive it home in the bore previously prepared by the. drill. 15" i 'drilling operation, so that when the top face of the screw head'is brought even with the plane The screw driving operation continues to a depth which is controlled by the of the upper 'face of the insole on --the interior of theshoe, the screw driving operation stops. The driver is then retracted, the clamp elevated, and the shoe removed." After removal of the shoe the clamp automatically returns to its initial drillingiposition where it is again loaded for a repeated cycle of operations.

. Referring more particularly to the drawings and first to Figs. 1 and 2, there is shown a machine comprising upstanding frame castings 20 and-2i resting on, a suitable base which is adapted tobeset on the floor. These frame castings are connected by rigidifying cross struts and supports 22 and 23 and: by a horizontal upper frame casting 24 bolted to their upperends. Suitable sheet metal sheathing 25 is preferably provided around all four sides of the machine between the base and the upper frame casting 24 to enclose most ofthe working parts.

Pivotallymounted in a central vertical bearing 26 (Fig. 6) cast inthe top frame 24 is a hollow vertical pivot 21 fixedtoand rotatable with a clamp post, 28 .This post has a bottom flange 29 by which it is fixedly screwed to a swinging clamp base 30 recessed on its underside toaccommodate bearing races 3| which are interposed between the swinging clamp base and the upper frame 24. Fixed to the lower end of the pivot 21 is a spring seat and-collar 32, the upper surface of which slidably abuts the under face of the frame bearing 26. Thus the post 28, clamp base 30, post pivot 21, and collar 32 are fixed together as a unit and may'collectively rotate; in the frame bearing 26. The post 28 has a bore 33 forming a continuation of thebore in hollow post pivot 21, through which aclamp rod 34 is slidably mounted with a. suitable key or splinefor preventingrelative rotation of the rod and post while permitting verticalsliding movement therebetween. A liftingcap 35 isscrewed forvertical adjustment into the lower end of rod 34 and an internally threaded spring seat 36 is adjustably screwed to the lower endof rod 34 above the lifting cap. A strong compression spring 31 is seated between the collar 32 andseat-36 and normally tends to urge the latter and the clamp rod 34 downwardly.- This spring applies the clamping pressure betweenthe shoe and heel while the latter is being drilled and attached, and itshould be able to apply a substantial pressure in order to assure firm pressing and compacting of the heel seat. In practice, a spring compressible up to or 200 pounds pressure issatisfactory, but this value may be raised or lowered to fit conditions imposed by the work at hand. rAtt'achedto the upper end of the clamp rod is a clamp arm 38 held against a shoulder 39 ,on the rod by a nut 40. Abutment of the armv38..against.the upper :face of post 28 marks tatable with-respect to the main frame bushing 26 onpivot 21. A I f; The swingable clamp. unit; is normally-,iheld biased tQward the right as viewedin =.-Fig. ,3 ,gbymeans of a tension spring 1-8 (Fig.5) extend ng between the main frame and an arm I1 projecting rearwardlydrom a downward extension 18 (Fig. 6) of the collar 32. Swinging movement of the clamp baseis limited by a stud?!) fixed to the clamp base 39 and having its lower end operating in an arcuate slot 89 in the upper frame Casting 24. When the-spring I9 pulls thestud I9 into the right hand end (Fig. 3) of thisslot the hollow jack pin spindle 43 is substantially in alinement with the drill mechanism.

One suitable means for raising the'clamp rod 39 may comprise. a motor driven hydraulic thruster which is so arranged that as long as. its motor is energized and operating, fluid pressure is applied against apistonso as to project and hold projected its thrust rod which in the present. drawings has been indicated at 8| (Figs. 2 and 6). Upon stopping the motor, the thrust rod settles back to its initial position. The vertical travel of the rodis confined between definite limits. Such motor driven hydraulic thrusters are commercially available in various types and their details need not beexpl'aihed here. In the pres ent machine the thrustrod 8I is, upon actuation of the thruster motor, adapted to be forced upwardly against a roller 82 carried at the end of a lever 83 keyed to. a rock shaft 84 mounted in the upstanding frame members 29 and 2I. Lever 83 carries a roller 85 adapted to'engage and lift cap 35 on the lower end of clamp rod 34.

- The shoe and heel drilling mechanism comprises a drill 86 (Fig. 4) having an exposed shank somewhat longer than the attaching screw which I trated, adapted to abut against the insole of the shoe being drilled at the end of the drilling op.

eration. To thisend the spindle 81 is mounted for vertical reciprocation while it rotates. The means for rotating the spindle comprises an elec tric drill motor 88 (Figs. 1 and 4) fixed to frame casting 2| with its drive pulley belted to'a driven drill pulley 89 which is keyed to the lower end of a driving sleeve 99. This sleeve rotates within a vertical bearing column 9| which is fixedly bolted to the frame struts 22 and 23. The interior driving connection between the sleeve 99 and the twist drill spindle 89 is the same as that for the corresponding screw driver rotating 'mechanism and will be described in connection therewith, since these features are best shown'in the sectional view of the screw driver rotating mechanism as illustrated in Fig. 4.

The screw drivers rotatable sleeve 599, which corresponds with the drills sleeve 99, is driven by a pulley 589 belted to an electric driver motor 588 fixed to the frame casting 29L Sleeve 599 turns freely within suitable'bearing bushings in the bearing column 59I and is held against vertical. elevation by abutment of its pulley hub against the lower end of such column. 'It is held is attached to a vertically sliding cylindrical car-- riage.595,'so as to partake of the vertical lifting movement of the latter, by means of an annular flange 598 near its upper. end which rests on ball-,bearing .raceways 591, which in turn rest ona journal bushing 598 carried at the upper end of the cylindrical carriage 595. A collar 599, which spins with the spindle 593, holds the latter againstriding upwardly with respect to carriage 595, 03 abutting the lower end of a journal bushing 999.fixed in the lower end of such carriage. The drillspindle 81.,"and the screw driver spindle 581-, are fixed in their respective chuck spindles, such as 593.

The carriage 595 is mounted for vertical sliding movement in the extended upper end of the.

tical slots 992 in the'walls of bearingcolumn 59I. These trunnions are respectively carried by links 993 which are pivotally suspended from rocker arms 994 which are each connected to a single rocker arm sleeve 895 (Figs. 4 and 5).

Returning to the drill mechanism, the cylin drical carriage corresponding with carriage 593 is lifted by trunnions borne by pivotally suspended links I93 which are hung from rocker arms I94 each connected with a single rocker arm sleeve I95. The rocker arm sleeves I95 and 695 are rotatably mounted in abutting relation on a rock shaft sleeve I96 which is rotatably mounted in a pair of suitable bearings I91 (Figs. 1, 4, and 5) 1 suspended from the upper frame casting 24. The rock shaft sleeve I96 is free to turn in such bearingsbut is suitably collared to prevent endwise axial movement. Within the rock shaft sleeve I96and axially slidable with respect thereto is a rock shaft axle I98 carrying atransverse clutch key I99 in the vicinity of the abutting edges ofrocker arm sleeves I95 and 695. .These rocker arm sleeves carry respective slots II9 and-6I9,

and I II and GI I (Fig. 5), which accommodate the projecting ends of key I99. The rock shaft sleeve I96 is also slotted to accommodate and permit} relative shifting movement in an axial direction; of such key'I99. The clutch key is .adapted to; be selectively shifted back and forth between slots H9 and 9I9 by means of an operating control handle or lever |I2 which is pivoted to an extension II3 (Fig. 4) on a collar 4 fixed to' rock shaft sleeve I 96 near its right endas viewed in Figs. 4 and 5. This pivoted handle has a flat section passing through elongated slots I I6 and the rock shaft sleeve I96. The shaft axle slot II5 embraces the" control handle loosely enough to permit it freedom of movement about its pivot, b'ut snugly enough to be moved thereby in an endwise axial direction as the handle is swung from right to left, and the sleeve slots H6 are sufficiently long not to interfere with this swinging movement. Thus the rock shaft-sleeve and axle together form a two-part rock shaft the parts of which rotate in unison by virtue of the passage of handle H2 and key I99therethrough, but which parts are capable of relative endwise shifting in an axial direction." When the control handle H2 is in its right hand position it pulls rocker shaft axle I98 to its right hand posi tionand sets clutch key I99 inthe clutch slots H9 and III of rocker arm sleeve I95. Depresthis switch cam: againsta friction washer I4I so that the cam-is free to pivot about the stud I39, but tends to remain inany position to which it is pushed. .The cam v I38 has a sloping face I42 which on; the upward movement of link 603 is adaptedto-wipe against the starting switch button I 43 and close the driver motor circuit and start; the motor 588. The cam has a tail I44 which, after 'the face I42 has wiped across the switch button I43 and started the motor, strikes andwipes against an abutment I 45 on the frame. As-is shown in dotted outline in Fig. 10, the wiping of tail I44 .against'th'is abutment during the latter portion of the lifting movement of the screw driver, tilts or cocksrthe cam I 38 outwardly so that during-the subsequent descending movement of the driver and its associated link 603,

th sloping cam face I42 clears the starting button I43. Thescrew driver motor circuit, once closed by such. button I43, has sustaining'means,

hereinafter described, so that the motor 588 continues torotate the screw driver until it is cut off by another control switch about to be described. Flor this reason it is not desired to have the cam -I38-wipe across the switch button. I43

sition, the descending tail I44 strikes a second abutment. I46 onrthe main frame which tilts the cambacktosits initial position with its face I42 again in'the path of starting switch button I43 for subsequent operation of such button the next time the driver is raised. v

I The screw drivingaction may be stopped by any suitable mechanismgsuch as a frictional slipclutch between the screw driver pulley 589 and its drive sleeve .500, or a suitably calibrated actuating cam on-the rock shaft I06, I08 forcutting out: the-screw driver motor. Preferably, however; the drill controlled motor stopping mechanism about to be described is employed.

The control switch. for stopping the screw driver motor 588--is mounted on the frame strut 23 near the rock shaftsleeveIOB. It has a push button-I41 (Ffig. 16) depression of which serves to openthedn'ver motor circuit "and stop rotation of the driver. :tThe stop'switch is of the so-c'alled.micro switch type and movement of the button vI41 through only. a few thousandths of an. inch serves to .openand close the switch connection. Thebutton accordingly canbe employedasa preciselylocated limiting abutment. It is adapted tobedepressed to stop the motor precisely at the moment when the top face of the screwhead reaches the plane of the inner or foot. engagingface of the insole. This point is'measured bythe shouldered drill spindle 81,

,it being recalled that during the drilling operation this spindle is'lifted until its shouldered upper end bears against and is stopped by the faceof the insole. In order to lift the drill spindle to this elevation the. rock shaft sleeve I06 must be turned through a determined are which is measured by the stop switch mechanism about to be described so that when the rock shaft again. is turned through this same are during the screw driving operation, the screw driver stop switch is engaged and depressed at precisely the ,proper point along the arc of rotation of rock shaft sleeve I06. ;Tl1emeans for'doingthis includes ,a slip collar I48 which'is clamped by a spring I49 in frictionally gripping but freely rotatable relation with rock shaft sleeve I06. The

from one of the links 603 which lift the driver spindle carriage. -A spring I40 urges a face of .slip collarttends to 'iturnwitl-rthis sleeve; but

can slip-with respect thereto. if it ispushed with Whichis adapted to abut and depress switch but- .ton. I41.- Preferably a pin I52 carried by the arm. I50 also engages the frame substantially .coincidentally with 1 the depression of switch button" I 41,- acting asa positive limiting stop to relievev the latter :of excessivev pressure. With .this arrangement; when thecontrol handle IIZ ,is-first depressed in 'its right hand position so asgto'lift the drill spindle 81; the rockingmove- .and any further movement impartedto'the rock shaft sleeve I06 merely causes the latter to slip around within-the, now stationary collar I48. Thus inbringing the sho ldered drilli spindle 81 into abutting contact-wit the inner face of the insole, the. rock shaft andits slip collar will be given. a-determined. 'mutual' angular relation which is determined by the vertical height to g which the drill spindle wasraised, whichin turn is determined by 'the' individual dimensions of each'shoe." When the 'drill'spindle has been fully raised until it'is stopped'by the insole, subsequent. retraction of this spindle and lifting of the control handle II2 causes clockwise movement of the rockshaft sleeve I06 '(Fig. 16) which is shared by the slip collar I48. During this movement the. arm I50 falls away from the switch button I41. During the subsequent screw driving operation, thecontrol handle is again depressed, this;time in its left hand position, so as to raisethe-screw driver spindle 581. This causes closing of the driver motor start switch I43 by the cam I38 and a sustaining circuit keeps such motorienergized until it is cut out bythe depression of stop switch button I41. This iseffected'when the rock. shaft sleeve I06 repeats the lifting are which has been measured by theprevious abutment of screw I5I against switch button -I'41and atthe completion of this lifting arcsuch screw'again abuts and depresses the stop switchbutton, stopping the driving motor. The-screw driver spindle 581 and its associated 'screw' driver are'so dimensioned that the head of :the screw is lifted 'to exactly the same horizontal plane: that: the shoulder on the drill spindle occupied at its uppermost position, in other words, the'plane of the face of the insole of the clamped shoe At this point the stop switch button I 41 t is reached and depressed.

Means'is provided for assuring measuring contact-between the screw I5I and the switch button I41 during each drilling operation regardless of the nature .of'possible variations in the heights of successive shoes.' This includes a second arm I 53 carried by? the slip collar I48. When the control handle I I2is in its uppermost position prior to a drilling operation, this'arm I53 is in the path of'a' slidable' push rod I54 mounted on the aeeaew arrangement isssuchithat rwheniflhe {thruster :rod

. Ilhe mock shaft Jfifl :also canrieszanwarm Hi2 which lupon depression of the :treadle zl'fil "wipes against and depresses a switch button M53 which closes the circuit through and energizes :a thruster motor ch64. rfiolong as the treadle ztfBl is held depressed, 'thisimotor montinues to rotate and thisinfiturn lizfits and ,holds :liitedthethruster rod 28L uthus opening the clamp :by lifting the clamprodM; mjv Thus :eaeh' time the olamp -:is opened the :pnsh

rod al 54 is moved fiorwandlylagainstitsrspringhias by themoller ;Ic56so asito engageithe arm :l'53 .on

I rslipkooitlar M18 zandzslip thezlaitter frna counter- ,olochwisedirection respect to the rocker shatt i 05, eat :thiswtime stationary rwithlcontrolthandle1H2 in its uppermost position. Thi-sslipnrovement of the seller brings wthewamn Mall somewhat toward the :stop switch :push button lltl andcmake'seentainwthat :the latter rbe reached by the-screw Il l during subsequent idepression lof oontrol handle 1 I22 during rthe next drilling o zaerartion. t l

brafikefis provided fior assuring-prompt stop pirig oi the rotation of theiscrew drivel-upon opening of the stop switch ibu'tton MT. "This snoludes a friction shoe $64 KEig. 4*) adapted to bear in rubbing contactagainst the race 02f the screw driver pulley 589. This shoe *ispivot'ally carried by a lever W5 :p'ivoted ati615 to 'the-mearingeoh 59 'I he lever I65 -is nonmallyibiased down wardly by 'a'spring I G-Teeated between snoli llever and a-spr ing -seatattaohed to the bearingoolumn B l The lever 11155 iis held raised'againstsuoh bias so as to=lii-t the brake s' hoe clear-of :ptilley 589 nun-agrotation or the sorew driver'hy a solenoid {I68 which is conneoted aoross the {leads of the;screw"driver rho-tor 5881 The armature I 'l-fi gl of this soleno'id is pivota lly 'lfi'rileed to the lever was and holds *the latter *in' elevated non-*brahing position until such time as the-screw driver stop switch button P4! fis -depressed, whereupon t'l' e ver l65 ;is released, thus 'promptly' braking' the screw driver spindle'to ast-opf After completion of {the screw driving operation, the pontrol handle I fIIis a-gain elevated, retraoting-the driver spindle '58! *to'ltsjlowermos't position Z-where it olears the shoe and lathe clamp base; The thruster "treadle lfil is'then depressed again, opening the clamp {by "lifting clamp-rod 34 and. arm "38', whereupon the-shoe is removed and rafcke'd. iflhe thrustentreadle ifi lgis then released allowing "the clamp to close under the bias or its spring jl. Inasmuch as "the 'clarnpfis now emptied, the arm 38 will he sent to *itsjlowerinost .position until "it 'is limited by en ageme t against the top .of clamp post 1211. This brings the lifting cap 35 to its lowermost position wliich is somewhat lower than its previous location duringt'he timejashoe and heel were'floadecl in the o'lampl. "Ijhis additional lowering of theoapf35is utilized to "release the 'clamp holding detent ,136 and allow the clamp unitantomatioa lly to-return to drilling position -;under the bias of its spring t6. The *meansfor doing this includes an'arrh I'HJ (Fig. 10) fixedto the rock shaft 84 which carries the lifting lever 8%. The outer end of arm 111] is pinned in-a. loose "motion slot Hl of alink W2 pivoted a bits'upperend to aleverfl'flt swingaihle about aafrxed pivot lfl in*- the-tipper frarneoastingl' The lever M3 has a rearwand ly extending flattened arm I15 seatedhetween the end shoulders of :a rfiat iportion atitfiien the stall 10f leyer i is imposition-to zbe engaged and depressed, when wanted, 'fby .a unanual push mod :I in. The

BI is slifitodctofinsertashoeat the drilling station, theiarm ll 1i!) rides; freely-in :looseomotiomslot 37H leavingiiherbullet detent ll 3:61am the driving station projected wu-nde'r ,its "tspningmbias When: it/ha thruster -:is allowed ,to'xsettle baok so as to (clamp thQLShDQ; :the lever :83 and arm-1i! 0 will 1 .comerto nest; with 'Ethewpin' :of 1 :arm cl Hill-engaging against and arrested by the runner: and ofqslot lli'lzlwthe strength of spring l3! and the weight a'ofknams :l'ltll, i512, and ;*.l-1;3 heing-sufiieient toboverhala-nce the weight ofrleveri83o :When the clamp :isolosed at the dnil'ling station, ithezlift-ingvcap 23.5 does ,not quite meach the molleridt' \whijch :settles :underxits own weightiias'zthe thnu-ster rod 81 sinks ,lll'ltilait is v stopped :by l the :lzlfl [bearing against the lipperyendiofqslot- H11. Whenthe clampedlshoe arm 'h'l01slightlyaso as (toretract :thebullet detent res; 'As soon as this happens, theuspring 16 isfree to TIEtUm'FthB'EGIaHIP unit :to its normal initial position at zthe diiliingstatiom and the spring :16 also restores the controlrlzrandle H2 :to'its right hand'rposi'tionwthnoughi .the-ilinkage 135, :lever 133,

etc: Accordingly; the clamp arrives in -nlosed oondition at "the? drilling Lstation ready to he opened :by -rthe .sfooi/ treadle IBI, rfor a repeated loading; drilling and-screw id Cving cycle :of operations.

:On'e sortable if onm iof ci-rouit iforoontrolling-xthe electrically-operated merits of: rtzhe lmaohine'rzis shown in; Fig. 1:7. jfHere current isled from asuitable source suchizaswa singlenphase line Ihaving leads-xLiwLz, to :a imain v -line switch 119. 1 {Elle clamp thruster motor iswitehipush button M163 is adapted to .close its associated switch 1.80 whenever the'tread'le .161 is rlepressed. Ilh-is-Epasses current irom:sLrzthnough ailead L81 through the now :closed .sw-itch 4:810 through :the thrusteramo tor-"IE4 and back through a lead :[82 t01-Lz. rSo

long as Smotor-lzli4 :is energized; the thnuster rod 81 is raised and held raised lbyitheaction .oinits hydraulic limpe'llertand piston, and assooniasithe motors I164 sis deeenergizedflayrelease of treadle MS :suchrod-settleszbaok to its lowermost position allowing :the iolamp to Iclose. With a ,shoe clamped in 1 position i at r :the drilling. station and the clamp :motori :l64 de-energized through re lease :of the fiodt imea'dle, t-he operator is readysto elevate the drill andstarttthe drill :motor; He does this by idepressing-ioontrol handl villi-.2, flirtingcthe button 14:! fromthemath of push rbutton I18 of .the drill motornstart Land stop switch hi8 enabli-ng current :to pass ifroni *Li Tthrough "lead L81 to a lead 4:84 through the now closed :switoh '|-*83 .and:the1rlril1 motor 8.8 and baok fthroogh a lead zl fi5 tolea d .lzazaand L2; "The drill motornontinues rotation as longaas therbutton 12M =is 'naised above :switch button d;lz8,:and stops 1&5 soon as button 1H5! returnstto itsmonmal position. 'iWith the :dnilling operation completed, the operator moves :oorntnol handle I12 wto rthe iefitgbrihging the clamped shoe in alinement with ithe screw; driver.- The \oontro'l handle M 2 ,is :then depresseidlcansing cam cl 38' to (depress the driner motor start swntoh buttondfi. 'ili'his ioloses the driving switch i853 a lead I8'I- and the now closed driver start switch I86 and through the coil I88 of a magnetic switch I89, and thence back to lead I82 and L2. Once the driver start switch button I43 has been de-' pressed to energize the coil I88, the magnetic switch I89 closes, passing current from L1 to terminal T1 through switch I89 to a motor lead I90 through the screw driver motor 588 and back througha lead I 9| through switch I89 to terminal T2 of L2. I

A sustaining circuit for the magnetic switch comprises a lead I92 from, terminal T1 to the screw driver motor stop switch designated I93. The push button I41 of this switch I93 norm-ally leaves the latter closed so that once the magnetic coil I88 has been energized so as-to close switch I89, current passes through T1 and lead I92; through normally closed stop switch I93 to the coil I 88 andback to lead I82 and L2. Once this sustaining circuit is set up the driver start button I43 can be released to open switch I86, which occurs when the cam I38 wipes past and clears such button I43, Thereafter the screw driver motor 588 is stopped by depression of switch button I41 of stop switch I93 when such button I4! is engaged by the screw I5I on'slip collar I48.

The coil of brake solenoid I68 and the coilof the screw socket magnet I are respectively connected across the screwdriver motor leads I90 and- I 9| so that these coils are energized con- "currently with such moton The operation is largely apparent from the foregoing description but may be briefly reviewed. In its normalco'ndition the clamp unit and its associated control handle II2 is swung to its right hand position and th control handle is' also in its uppermost position. The operator now steps on treadle I6I, energizing the thruster motor I64 and lifting the clamp rod 34 which remains elevated and holds the clamp open so long as he leaves his foot on treadle I6I. A lasted shoe is now inverted over the hollow last jack pin 43 and its heel is seated by hand over its heel seat, which has previously been cut on and prepared for reception of the heel. Cement may or may not be applied before the screwing operation, as desired. In preferred practice, it is found that cement is not needed. The operator now releases treadle I6I allowing the top-lift and back h'eel clamps M and 42 to bear against the heeland hold it in place. Control handle II2 is now depressed, causing cam I I9 to raise detent I24 into recess I26 to hold the clamp base firmly in exact registry with the drill during the ascent of the latter. Continued depression of handle II2 lifts the drill spindle 81 through the aperture in the last and drills through the heel seat materials into the heel until th shouldered end of the spindle engages the insole. The extent of the depression f handle I I2 neededto imp-art this lifting movement to the drill is measured by the slip collar I48. After drilling, the operator returns the handle I I2 to its uppermost position, freeing detent I2 4 from recess I26 and enabling the operator to shift the controlhandle to the left, thus engaging clutch bar I09 with the screw driver lifting carriage and also swinging the clamp unit into alinement with the driver where bullet detent I36 snaps into recess I 26. The control handle is .now depressedin its left hand po-' 'sition, starting the driver motor and lifting the driver until the latter screws the wood screw inserted in socket I28 home flush'with the inner face of the insole, which position is determined by the slip. collar I48 and its associated driver motor stop'switch. When" the screw driver stops its driving movement this can be felt by the operator who again elevates the control handle II2 and-let's it go to remove andrack the shoe. To this end, the treadle I6I is again depressed, opening the :clamp, and when thetreadle I6I is released to allow the clamp'to close this complete closing movement retracts detent I36 from recess I26 and allows the closed clamp to swing to the right into alinement with'the drill where it is readyto be opened and loaded with a new shoe and. heelfor a further attaching operation.

It will be seen that a heel attaching machine has been provided which is capable of inserting a fastener rapidly and'accurately in the heel of a lasted shoe and that. such machine is subject to'easy control through a foot treadleand single operating lever, which simplifies the work of the operator and enables him toattain a high daily rate of production. The machine inserts a permanent fastener in the shoe which holds the heel attached during the final stages 'of shoe manufacture and also is useful in afi'ording a strong attachment during wear. Preferably, in addition tothe permanent -wood screw the usual five heeling nails also are driveninto the heel after the shoe is delasted, although this may be dispensed with if wanted. .7 I

- It will be understood that certain changes could be made in the formof machine which is illustrated by way of example without departing from the scope oftheinvention. Thus instead of an hydraulic thruster any equivalent lifting means such as an electric drive motor and suit able geartrain and pitman could be used to impart the desired reciprocatory movement to clamp rod 34. .The clamp construction itself has novel features which can be used to advantage in various kinds of heel treating. machines and which need not necessarily be combined with the particular drill and driver illustrated. The clamp also, ifwanted, could be mounted on a fixed frame, in which case the. drilland driver could be carried by a swinging framefor selective alinement with the clamped shoe. If wanted, instead of using a wood screw, .the screw lifting spindle could be used to pressv fit a rivet or nail or like fastener, in which case the. fastener inserting spindle would not have .to be rotated.

The mechanism whereby the drilling operation is.- utilized to measure and control the extent of the related driving operation is of general utility in various, related operations and is broadly claimed in my co-pending joint application with John F. Smith, Serial No. 394,836, filed May 23, '1941, which has maturedas Patent Number 2,306,787 of December 29, 1942.

Since certain changes maybe made in the above construction and different embodiments of the invention could be made without departing from the scope thereof,,it is intended. that all matter contained in the above description or shown inthe accompanying drawings shall be interpreted as illustrative and not in a limiting sense. It is also understood that the following claims are intended to coverall of the generic and specific features of the invention herein described, andallstatements of the scope ofthe invention, which, as a matter of language, might be said to fall therebetween.

Having described my invention, whatI claim as new and desire to secure by Letters Patent is:

1. In a heelattaching machine, the combination comprising, a frame, a drill and a driver ag ssaarr "mounted onsaid "frame a-clam for holding a shoe and "heel together "swinga-bly 'mounted on said frame, means-"normally urging" said clamp in shoe holding' positiony and means for successively-aiming a shoe andheel held bysaidclamp "in operative relation with respect to said drill and driver. "2. In a heel attachingmachine; thecombination comprising aframepa fdrill and a driver movably mountedon said'frame;-a clamp normally" biased to hold a shoe and heel together swingably mounted on saidframe for-movement between positions respectively in operative-alinement with said dr'ill and 'driver, *means for rotating" said drill, and means i'or successively -moving said drill' and driver "into operative relation with 'a shoe and heel heldbysaid clamp. i

i 3. In' a heel screwing machine; the combination comprising; a frame, a; drill and a screwdriver mounted for-vertical movement o'nsaid frame, a clamp normally biased to 'hold a' shoe and a heel mounted for horizontal swinging-movement on. said frame; b etween positionsrespectively in op- .erative alinem'ent with said 1 drill and :driver, means for rotating said idrill and said idriver, 1 and means for successively raising and lowering said drill and driver into-mperativerelation with a shoe and heel held by said clamp.

+4.- Aciheelr attachingrmachine, oompris'ing, in

oom-binatiom a drama-La drill. and adriver movablymounted on said frame,-.a Iclamp for .holding La shoe and'l-heeli:together .mountedrcon said frame for lmovement: betweenz positions. respectively in operative alinem'ent .with L said.;dril1 .andzvdriver,

:means. for rotating said: drill, an operatinghandle,

zand connections between said handle and-said drill, driver I and clamp forrsuccessively .movingza shoe and heel' held byzsaid: clamp into operative lalinement with'isaid'adrill and1.driver land for successively moving saidtdrillaanddriver into operativerelationwith said :shoe and: heel.

. :5. "Aheel' attaching machineaacoording to claim -4;having means for controlling said drill rotating .imeans throughsaid-operating' handle.

, 56.. .In a heel attaching machine, ithe combination comprising; a frame, :spaoed drill: and: driver ele- :ments mounted on' saidframe; a clamp. normally ibiased to.-hold a-zshoe': andheel togetherzmovably .mounted on'said trame means' biasing said clamp znormallyi into -operative=g.alinement with one of into operative ,alinement with :the remaininguele- .ment. 1; v .l In aheel attachingmachine,-the combination compr ising,-. a frame; spaceddrill and. driver elea clamp :for holding a :shoe and heel together ohorizontallyswingable onsaidfram -means biasiing said clamp normally: into. alinement with .one

of -said elements, and means including a single v about its axis-selectively-to aline's'aid drilhand driverwith a shoe-held bysaid clamping means. 9. In a heel attaching machine,the-combination comprising, a fixed-frame member: having-a vertical bearing therein, a swinging member mounted for horizontal oscillatory movement in said bearing, clamping means normally biased to hold a shoe 'andaheel together carnied on-one of said members :and-adrilland a driver carried on the other member, means for reciprocating said drill and said driver selectively into-operativerelation with aisho'e held bysaid clamping means, and means for moving said swinging member selectively-'to aline saidshoe withisaid'drill and driver.

1-0. In a heel attaching machine; the combinationcQmprising, a fixed frame member having a vertical bearing thereinya swinging member mounted for horizontal oscillatory movement in said bearing,clamping-means for holding-a shoe and i a heel together carried on one of .saidmembers and a-drilland-a driver carried on the other member,-means for reciprocating said drill and said driver selectively into operative relation with ashoe =he1d-by said clamping means and means i for 'movingsaid swinging member selectively to aline said shoe with -said drill and driver, the -means for-reciprocating said drill: and driverand for swinging said swinging means. including a single common control for said-named parts.

I 11; Inaheelattaching machine, the combination comprising a fixed franie member 'havingia vertical bearing i therein, -a a swinging member "mounted for horizontal oscillatory movement-fin said bearing; clamping means normally biased-to hold a shoe and aheel together carried -on one -of said members and a drilland-adriver carried on the othermember; means for-moving said swinging member "between drilling and driving positions-at either-*end of its swinging-arc, locking -1neansfor-holding said swinging cmemberselectively at either of said positions,- means' for -re- 'ciprocating said drill and driver selectively into operative relation with a shoe heldby said clamping means, and means ioraxially rotating said drill. i

*12. In a heel attaching machine, the combina- 'tion' comprising; -a fixed frame member having a-vertical bearing-thereinaa swinging member .saidelements, and'means for moving said clamp I .ments each vertically creciprocable on saidframe,

control handle for swinging saidclamp .into operative alinement'withthe remaining element and for selectivelyraising:andlowering said drill and driver elements.

, 8. In a heel attaching machine, the combination comprising,---a vfixed frame :meInber .having-.-an

upper horizontalsurface and a swingablewmemher: pivotedoabout a vertical'raxisfor: swinging mountedforhorizontal oscillatory movement [in said bearing; clamping means f-oriholding a shoe and aheel together carried on one of said members and; averticallyreciproc'able drill and driver each carried -'on"the-other member, a control handle, connections between-said handle and swinging member for moving the latter between opposite limitsfioffits-swi-nging arm-and connec- "'tions between sa'id handle and- -said drill and driver, for-recip1iocating9the-latterrespectively into operative relation-with a shoe held by said clamping means when-said swinging "member is at. corresponding"respective "limits of itsswing- "ingarc. a

l3: Ina heel attachingmachinefthe combina- .tion comprising; afixed frame'member having a vertical bearing therein; at'swinging member mounted ionhorizontal oscillatory movementin said bearin clamping means for holding a shoe and-a heeltogthercarried on one of: said members and a vertically ,reciproca ble drillyand driver each carried-on the -other member; means .Joiasingsaid swii iglng inemberto one limit of its s'wirigingarc, a. control han'dle, connections. be-

.tween. said. handle Hand. swinging member. ,for a moving the latter againstits biasto the other limit; *of' its swinging arc, connections between said handle and said drill and driver for reciprocating the latter respectively into Operative relation with a shoe held by said clamping means when said swinging member is at corresponding respective limits of its swinging arc, and means for opening and closing said clamping means.

14. In a heel attaching machine, the combination comprising, a fixed frame memberhaving a vertical bearing therein, a swinging member mounted for horizontal oscillatory movement in said bearing, clamping means for holding a shoe and a heel together carried on one of said members and a vertically reciprocable drill and driver each carried on the other member, clamp opening and. closing means for said clamping means, means biasing said swinging member to one limit of its swinging are, a control handle, connections between said handle and swinging member for moving the latter against its bias to the other limit of its swinging arc, connections between said handle and said drill and driver for reciprocating the latter respectively into operative relation with a shoe held by said clamping means when said swinging member is at corresponding respective limits of its swinging arc, a detent for holding said swinging member against its bias, and means governed by said clamp opening and closing means for releasing said detent. I

15. In a heel attaching machine, the combination comprising, a fixed frame member having a vertical bearing therein, a swinging member mounted for horizontal oscillatory movement in said bearing, clamping means for holding a shoe and a heel together carried on one of said members and a vertically reciprocable drill and driver each carried on the other member, clamp opening and closing means for said clamping means, means biasing said swinging member to one limit of its swinging are, a control handle, connections between said handle andswinging member for moving the latter against its bias to the other limit of its swinging arc, connectionsbetween said handle and said drill and driver for reciprocating the latter respectively into operative relation with a shoe held by said clamping means when said swinging member is at corresponding respective limits of its swinging are, a detent for holding said swinging member in its biased position, means governed by said handle for moving said detent into operative position, asecond detent for holding saidswinging member against its bias, and means governed by said clamp opening and closing means for releasing said second detent.

driver,- said unit having opposed; relatively movnamed position thereof, and means for selectively; reciprocating said drill and driver into operative; relation with an alinedyshoeheld by said clamping parts. I I

18. In a heel ,attaclnngmachine, the combination comprising, a frame,'adr ill and a parallel driver reciprocable on saidframe, a clamping .unit swingably mounted on said frame about an axis parallel with and equidistant from said drill and driver, said unit having opposed relatively movable clamping parts anda spring normally urging said parts together to hold a shoeand heel therebetween,-means for selectivelyswinging said unit into alinementwith said drill and driver, means on said frame operable along'the swinging axis of ,said clamping unit to open the clamping parts .of; the latter in either named position thereof,

and means for selectively reciprocating said drill and driver into operative relation with an alined shoe held bysaid clamping parts.

19. In a heel attaching machine, the combination comprising, a frame,adrill and a, driver mounted thereon, ,a clamping unit, movably mounted on said frame for selective lalinement with, said .drill andrdriver, relatively movable work engaging clamping parts on said.1unit for holding a shoe-and. heel therebetween-a' spring on said unit urging said parts into work holding position, means on said frame for opening said parts against theirspring bias, and means for selectively efiecting relative approach of a shoe held by 'said-clamping'unit and of said. drill and driver into operativerelation with one another.

20. In a heel attaching machine, the combination comprising, ;a 'frame, a drilland a driver mountednthereon, a clamping unit movably mounted on said frame forselective alinement with said drill and-driver, relatively movable work 'engagingclamping parts on said unit for 16. In a heel attaching machine, the combination comprising, a frame, a, drill and a driver reciprocable on said frame, a clamping unit swingably mounted on said frame about an axis equidistant from said drill and driver, said unit having opposed relatively movable clamping parts normally biased towards each other to hold a shoe and heel therebetween, means, for selectively swinging said clamping unit into alinement with said drill and driver, means for opening and closing said clamping parts, and means f'or'seleotively reciprocating said drill and driver into operative relation with an alined shoe held by said clamping parts. I I v I 7. In a heel attaching machine,'the combination comprising,a frame, a drilland a parallel driver reciprocable on said frame, a clamping unit swingably mountedon said frame about'an axis parallel with and equidistant 'fromsaid drill'and' 'tioncomprising, a frame, a'drill and a driver reciprocable on said'frame, a clamping unit movably mount'edon said frame for selective alinement with 'sai d drill and driver, relatively movable work=engaging parts on said unit normally biased-towards each other to hold 'ashoe and a heel therebetweenmeans on said frame for opening said clamping parts, and'means for selectively reciprocating said drill and driver into operative relation with'a shoe held by said elamping parts.

22. In a heel attaching machine, the combination comprising, a frame, a, drill and a driver reciprocable on said frame, a clamping unit movably mounted on said frame for selective alinement with said drilland driver, relatively movable work-engaging parts on said unit for holding a shoe and a heel therebetween, means for opening and closing said clamping parts, means for selectively reciprocating said drill and driver into operative relation with a shoe held by said clamping parts, and an operating lever for actuating and controllingsaid reciprocating means;

lasted one last having' it's ja'ck pinhol a :for moving said tively apart againsttheir spring bias ferent Work stations.

'36.}In amachine for'screwing' a'heel to therethrough, a frame a screw drivenrecipro cab1y',rnounted on said frame; a socket in' '.said

frame fior holdingljan inverted headed rew: and having an aperture :inits bottom permit n g r a sageof. said driver, a, clampingfunit'eompris'ing f or. hold in a shoe and heel ltherebetween, said screwdriver, socket,f 'andjack pin being; alinemen t during a ,screw driving; foperation and means fol. rotating said screw, driver K -37. In amachine for attaching a heel to ashoe -'lasted on a last having its jack pin' hole-extended therethrough, adrill anda driver each: ,rec iprocable on, said frame a clamping unit movabl on said frame having a hollow jack-pin andan opposed heel clamp adapted to hold a lasted shoe and a, heel therebetween, means vfor, moving; said 7 clamping unit to bringsaid hollowjack-pin suc- "39. In a heel treating machine, a frame, a; heel clamping unit including relatively movablework engaging clamp parts, said unit being pivotedon said frame for movement between differentwork stations, spring means on said. unit urging said clamp parts together, and means'on-said, frame for opening said clamp parts againsttheir spring bias, said clamp opening means beingoperative- 1y engageable with said unitialong it's pivotalaxis whereby it may engage and openthe clamp parts of the clampingiunit while the; latter is at dii- 40. Ina heel treating machine,' a frameg a clamping unit having 1 a. relatively:=movable topliftclam'puand abase carrying a shoe support .for holding a shoe and heel therebetween, spring meansqon said unit for urging and, moving said top-lift clamp and shoesupport together, means pivoting said unit-on said frame for movement 1a hollow jack-pin and a cooperatin heel {clamp drill and driver through said jack-pin and into between different work stations,-jan d ;means on,

the frame for moving said clamp and shoe support relatively apart against their spring bias, i 41. In a heel treating machine, a fixed frame,

' aclamping unit having a relatively movable toplift clamp and a base carrying a shoe support for,

holdin a shoe and heel therebetween, a pivot connecting said frame and unit for swinging ,movement of the latter between different work stations, and means on said fixed frame operable along the axis of said pivot for, relatively opening and closing said clamp and support while said unit is'at any of said work stations.

. 12. In a ,heel treating machine, a frame, a clamping unit having a base carrying a shoe hold a shoe and hee1-therebetween,,and means for registering said jack pin arld's'oc'kt.

liftclamp, and means on the frame for reciprofi s duf I :43. In, afheel treating I'na'chine, a' frame, a clamping unit havin'gfa'base carrying a shoe support and a re'ciprocable top-lift clamp opposed to said support, a pivotconnecting said'frame and unit for swinging movement of thelatter between different work stations, a rod, passing slidably through said pivot and carrying said top-lift clamp, spring means carriedwith said uniturgin'g said clar'np' toward said shoe support, and means on the frame for 'moving saidrod to move said 'top-lift"clamp against its bias away from said support. v

44. In a heel treating machine, a frame having a vertical bearing therein, a clamping'unitcomprising a, clamp base mounted for horizontal swinging movement and having apivot in 'said bearing, a shoe support on said clamp base, and

slidable through said pivo't a'nd bearing, a toplift clamp carried at the upper e'nd'fof said rod above said shoe supportjja"springbetween said clamp base and rod urging the latter downwardly, and means on the frame for engaging an'd'lifting saidrod' M H .45. In a heel treating .n achine, a fixed" frame, a clamping unit comprising a clamp base having ,an upstanding hollow post thereon; a shoe support on said base, a rod slidable through said post, means pivoting said unit to said frame along the axis of said rod for swinging movement of the unit between different workstations, a top-lift clamp carriedby said rod opposite said support, means carried by said unit for reoiprocating'jsaid rod axially in one direction relativelyto, said clamp base, and means on said frame for reciproeating said-rod in the' opposite direction,

46. Ina heel treating machine, a fixed frame ,having a verticalbearing therein, ,a clamp base having an alined upstanding post and depending pivot fixed thereto with. saidpivotr'otatable in said frame bearing, a shoe supporton said clamp base,a rod slidable through said post, clamp base, andpivot, an arm on. the u per end of said rod above said post a top-lift clamp n-saidv arm overhanging said shoe support, a spring seat on said pivotand another springseat therebeneath on the lower endlof said rod,- a compressionfspring between said seats, and means on said.; frame in support and a reciprocable top-lift clampopposed tosaid support, a pivot connecting-said frame -and,.unit for swinging movement of the latter between different workstations, a rod passing .slidably through said pivot and carrying said, topalinement with and operable tolift said rod. I

47. In a fastening inserting machine, a reciprocatorydrill, a reciprocatory fastening- -inse rting device, a work-support initially positioned and retained against movement to receive the action of the drill, and meansfor moving the support to a position to receive the actionpf'the inserting device, holding it againstmovement during such actionand then returning it to its initial position at the drill.: I

, 48. In a fastening-inserting machinela reciprocatory drill, a -reciprocatory' fasteningeinserting device, a work-support initially positioned to receive the action of the drill, and means for moving the support to apositionto receive the action of the inserting device, for returning;v it: to its initial position: at the, drill and for retracting the device for the return of the support.

49. In afastening-inserting machine, a recipro- "catory drill, a reciprocatory fastening-inserting support'to a position to receivethe action of the 1 drill, and means for moving said work-support to a position to receive the actionpf-the insertdevice, a work-support, means urging said working; device, for holding it a ainst-( movement during inserting suchacticn and retracting th 

